085
NZUS99 KBOI 270416
TXTSFD
IDAHO STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
916 PM MST FRI DEC 26 2025
A SIGNIFICANT COLD FRONT IS SWEEPING ACROSS THE STATE TONIGHT INTO TOMORROW
MORNING, BRINGING GUSTY WINDS AND WIDESPREAD PRECIPITATION THAT WILL
TRANSITION FROM RAIN TO SNOW AS SNOW LEVELS LOWER TO VALLEY FLOORS ACROSS MUCH
OF THE CENTRAL AND NORTHERN PANHANDLE BY THIS EVENING. WINTER DRIVING
CONDITIONS ARE EXPECTED ON MOUNTAIN PASSES STATEWIDE, PARTICULARLY LOOKOUT AND
LOLO PASSES, WHILE THE SNAKE RIVER PLAIN AND SOUTHWEST VALLEYS WILL SEE GUSTY
WINDS AND A MIX OF RAIN AND WET SNOW. AS THE FRONT EXITS TO THE EAST ON
SATURDAY, PRECIPITATION WILL TAPER OFF, PAVING THE WAY FOR A STRONG HIGH
PRESSURE RIDGE TO BUILD OVER THE REGION STARTING SUNDAY. THIS SHIFT IN THE
PATTERN WILL REINTRODUCE STABLE CONDITIONS FOR THE FIRST HALF OF NEXT WEEK,
TRAPPING COLD AIR IN THE VALLEYS AND LIKELY LEADING TO PERSISTENT INVERSIONS,
AREAS OF DENSE FOG, AND LOW STRATUS CLOUDS IN THE SNAKE PLAIN AND SHELTERED
VALLEYS WHILE MOUNTAIN ELEVATIONS EXPERIENCE SUNNIER AND MILDER CONDITIONS.
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